Electric switch



p 29, 1931. H. E. NOIRVIEL 1,825,414

ELECTRIC SWITCH Filed Jan. 28, 1928 @ZZM auiozweqa Patented Sept. 29, 1931 UNITED STATES HARRY E. NORVIEL, F ANDERSON, INDIANA,. (Assre1\ion'ro.nnnoormiivmconronm- TION, or DAYTON, 01110, A CQRPORATIGN or DELAWARE.

ELECTRIC swrirou- Application filed January 28, 1928; Seria:1 No ;-250,1053

This invention relates to electric switches and one of its objects is to provide a novel and simple means for securing a wiping action between the switch contacts for the E purpose of insuring a good electrical connection between the contacts and also to minimize the accumulation of dirt or metallic oxide upon the engaging surfaces of the contact members.

In the present invention this aim is accomplished by providing an electric switch in which a movable contact element is a leaf spring conductor fixed at one end and having a bowed free end, the concave surface of by a stationary contact. A movable actuating member presses the bowed end of the;

flexible conductor against a stationary contact and so to speak, tends to iron out the amount of curvature of the bowed end of the spring conductor by an action which causes this bowed end to be laterally displaced relative to the stationary contacts while being maintained in engagement therewith.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of embodiment of the presen invention is clearly shown.

In the drawings:

Figs. 1 and 2 are side and front end views, respectively, of a switch embodying the present invention.

Fig. 3 is a sectional view on the line 33 of Fig. 2.

Fig. 4 is a sectional view on the line 4+4: of Fig. 3. I V 1 r Fig. 5 is a sectionalview on the line 5-5 of Fig. 3.

Fig. 6 is a sectional view on the line 66 of Fig. 4.

Figs. 7 8 and 9 are diagrammatic views showing the relative positions of the switch members in various operating positions.

The switch case is provided by a tubular member 20 interfitting with a metallic end wall provided by a key shaft frame 21, and

receiving a nonconducting end wall 22 which which engages a convex surface provided may be also the end wallof an ignition coil housingtincluding; a. tubular: casez-23 iwhich encloses primary winding 24,;the:1secondary winding 25;"and:thecenterwcore 2.6... .Theiprimary: winding 2a.:mayvbe:connected by wire; 1

' 27swith'; a;. metallic :insert 281aemb'eddedwin the m:

insulating end memberr22 by amoldi11g:op=- oration; .f Theinsert28; provides thecstatiom any switch. contact. and shasa :somewha't'rcom vexend %29-.-for engagement by the bowed end 2 30 .of a leaf: spring;conductor;311which .is at 1;; taohed to a rivet; 32 xhavingyaitszhead ienr-l bedded! in the molded insulating; end mam-.1: ber; 22-xasrshown-,imFig. 6; The'insertIor rivet, 32 is connected .by wire 33 with: one :of-x: the; terminals, nonshowmaofgthe; ignition coili: a? The frame 21 supports a key shaft 40 .1 which carries a. pluralityi'of'laterally;moving lockingv bars: 41? which, when theaproper: key d3-1isr-inserted in the shaft. 40, will be moved out% of longitudinally extending grooves 42 5 in.. t-he frame;-21i-and1will:be;so locatedwthati theirq ends; 5 :are-: flush. with: i the cylindrical; 1 periphery, of. the :shaft .40.: 1 Screws-44 attach toythe shaftj 40, az'non conductin'g contact: actuator 45 and: a detentnplatear lfi having 753* holes ;or,- rreces'sesc lf .each for receivil'ig :a ball: I 48 whiehis' guidedbyvrecess 49 insthe: frame 21:, and. 'lwhich is; urged toward the detent: platedevby springz50. Tl Referring to Figs. 7, 8 and 9, in which these operation ofF-t'he switch is shown .:diagrammati'cally; when :the switch" is 0d, the 'operat ing redgezorcamming:portion 55 ofthe actuator A5 iwillabe located relative to the bowed- 611(1130 of:the. contact.31asshown 7- in1 order'itoz permit the I bowed 1 end 30 w: be separated ifro-m the istationary :contact 29 due to the resiliency off-the. spring bladeB'L- Astheactuator4=5 is turned in a clockwise directionias yiewedinFigA,the-actuator lawill firstrengag er the bowed end 30 of the con 'du'ctor'31ialong the side 1 oflth'e arch pffi'the bow inorderftorcause-the conductorto touch the contact29l Dldllll g fllltlfel. movement of the actuator 45 in a clockwise direction as arch of the bowedend 30, thecoaction be- 1 tween the actuator and the bowed end 30 of the spring 31 is such as to tend to iron out or diminish the curvature of the bowed end 30. During this action the spring conductor 81 will be displaced laterally toward the left with respect to the convex end of the contact 29 in order to produce such a rubbing action as will tend to maintain the contact surface of the switch contacts in a relatively clean condition so as to insure making a good electrical connection.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. An electric switch comprising a leaf spring conductor fixed adjacent one end and having a bowed free end, a stationary contact engageable by the bowed end of said conductor, a housing supporting said contact and conductor, and having interfitting engagement with a metallic end wall, said end wall providing a member engageable with the conductor for causing the bowed end to engage the stationary contact and for modifying the shape of the bowed end while engaging the contact in order to produce a wiping between the conductor and the contact.

2. An electric switch comprising a leaf spring conductor fixed adjacent one end and having a bowed free end, a stationary contact engageable by the bowed end of said conductor, a housing supporting said contact and conductor, and having interfitting engagement with a metallic end wall, a member rotatably supported by said end wall, and means for causing the bowed end to engage the stationary contact and for modifying the shape of the bowed end while engaging the contact in order to produce a wiping between the conductor and the contact.

3. An electric switch comprising a leaf spring conductor fixed adjacent one end and having a bowed free end, a stationary contact engageable by the bowed end of said conductor, a housing supporting said contact and conductor, and having interfitting engagement with a metallic end wall, a lock controlled member provided by said end wall, and meansmovable in response to said lock controlled member for causing the bowed end to engage the stationary contact and for modifying the shape of the bowed end while engaging the contact in order to produce a wiping between the conductor and the contact.

In testimony whereof I hereto aifix my signature.

HARRY E. NORVIEL. 

